Adolf Hitler's Secret Nuclear Weapons Complex Discovered in Austria

A WW2 labyrinth of underground tunnels believed to have been used to develop a nuclear bomb has been uncovered.

The facility, which covers an area of up to 75 acres, was discovered near the town of St Georgen an der Gusen, Austria.

Excavations began on the site after researchers detected heightened levels of radiation in the area - supporting claims that the National Socialists were developing nuclear weapons.

Documentary maker Andreas Sulzer, who is leading the excavations, told the Sunday Times that the site is 'most likely the biggest secret weapons production facility of the Third Reich'.

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It is believed to be connected to the B8 Bergkristall underground factory, where the Messerschmitt Me 262 - the first operational jet fighter - was built.

But while the Bergkristall site was explored by Allied and Russia after the war, the germans appeared to have gone through greater lengths to conceal the newly-discovered tunnels.

Its entrance was only uncovered after the excavation team, which includes historians and scientists, pieced together information in declassified intelligence documents and testimonies from witnesses.

The team is now in the process of removing layers of soil and concrete packed into the tunnels and heavy granite plates that were used to cover the entrance.

Helmets belonging to Waffen-SS troops and other National Socialists relics are among the items that have been uncovered so far.

The excavation was halted last week by police, who demanded the group produce a permit for conducting research on historic sites. But Mr Sulzer is confident that work will resume next month.

He told the Sunday Times: 'Prisoners from concentration camps across Europe were handpicked for their special skills - physicists, chemists or other experts - to work on this monstrous project and we owe it to the victims to finally open the site and reveal the truth.'

The probe was triggered by a research documentary by Mr Sulzer on Hitler's quest to build an atomic bomb.

In it, he referenced diary entries from a physicist called up to work for the National Socialists. There is other evidence of scientists working for a secret project managed by SS General Hans Kammler.

Mr Sulzer searched archives in Germany, Moscow and America for evidence of the nuclear weapons-building project led by the SS.

After the war, Austria spent some £10million in pouring concrete into most of the tunnels.

But Sulzer and his backers believe they missed a secret section where the atomic research was conducted.

The Soviets were stationed in St Georgen until 1955 and they took all of the files on the site back with them to Moscow.

Experts are trying to discover if there is a link between St Georgen and sites in Germany proper where scientists were assembled during the Third Reich in a bid to match American efforts to build the ultimate weapon.

In June 2011, atomic waste from Hitler's secret nuclear programme was believed to have been found in an old mine near Hanover.

More than 126,000 barrels of nuclear material lie rotting over 2,000 feet below ground in an old salt mine.